package com.atguigu.springcloud.service.impl;

import com.atguigu.springcloud.service.IMessageProvider;
import org.springframework.cloud.stream.annotation.EnableBinding;
import org.springframework.cloud.stream.messaging.Source;
import org.springframework.messaging.MessageChannel;
import org.springframework.messaging.support.MessageBuilder;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.UUID;

/**
 * @author yanglin
 * @create 2023-11-14 16:09 星期二
 * description:
 */
@EnableBinding(Source.class) //定义消息的推送管道    //@EnableBinding:指定信道channel和exchange绑定在一起
public class MessageProviderImpl implements IMessageProvider {

    @Resource
    private MessageChannel output;    //消息发送管道
    
    /**
     * 发送消息
     * @return
     */
    @Override
    public String send() {
        String serial = UUID.randomUUID().toString();
        output.send(MessageBuilder.withPayload(serial).build());
        System.out.println("****serial: " + serial);
        return serial;
    }
}
